Gottlobite: Difference between revisions
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| diaphaneity = Transparent |
| diaphaneity = Transparent |
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| other = Brittle |
| other = Brittle |
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| references = <ref>[http://webmineral.com/data/Gottlobite.shtml#.WhhKL7Q-dE4 Gottlobite]. Webmineral. Retrieved on 2017-11-24.</ref><ref> <ref>{{cite journal|last1=Witzke|first1=T.|last2=Steins|first2=M.|last3=Doering|first3=T.|last4=Kolitsch|first4=U.|title=Gottlobite, CaMg(VO4, AsO4)(OH), a new mineral from Friedrichroda, Thuringia, Germany|journal=Neues Jahrbuch fur Mineralogie. Monatshefte.|date=2000|volume=Monatshefte 2000|pages=444-454|accessdate=23 November 2017}}</ref> |
| references = <ref>[http://webmineral.com/data/Gottlobite.shtml#.WhhKL7Q-dE4 Gottlobite]. Webmineral. Retrieved on 2017-11-24.</ref><ref> <ref>{{cite journal|last1=Witzke|first1=T.|last2=Steins|first2=M.|last3=Doering|first3=T.|last4=Kolitsch|first4=U.|title=Gottlobite, CaMg(VO4, AsO4)(OH), a new mineral from Friedrichroda, Thuringia, Germany|journal=Neues Jahrbuch fur Mineralogie. Monatshefte.|date=2000|volume=Monatshefte 2000|pages=444-454|accessdate=23 November 2017}}</ref></ref> |
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==Overview== |
==Overview== |
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'''Gottlobite''' ([[Calcium|Ca]][[Magnesium|Mg]]•[[Vanadium|V]]([[Arsenic|As]],[[Hydrogen|H]],[[Oxygen|O]])) is a [[mineral]] that is found as isolated crystals of orange or orange-brown color, or in some cases as isometric grains. The maximum size of the crystals are a half millimeter. Gottlobite is part of the adelite structure group of vanadates and arsenates. As such, it is similar to the minerals tangeite and austinite by x-ray diffraction methods. {cite journal|last1=Witzke|first1=T.|last2=Steins|first2=M.|last3=Doering|first3=T.|last4=Kolitsch|first4=U.|title=Gottlobite, CaMg(VO4, AsO4)(OH), a new mineral from Friedrichroda, Thuringia, Germany|journal=Neues Jahrbuch fur Mineralogie. Monatshefte.|date=2000|volume=Monatshefte 2000|pages=444-454|accessdate=23 November 2017}}</ref> |
'''Gottlobite''' ([[Calcium|Ca]][[Magnesium|Mg]]•[[Vanadium|V]]([[Arsenic|As]],[[Hydrogen|H]],[[Oxygen|O]])) is a [[mineral]] that is found as isolated crystals of orange or orange-brown color, or in some cases as isometric grains. The maximum size of the crystals are a half millimeter. Gottlobite is part of the adelite structure group of vanadates and arsenates. As such, it is similar to the minerals tangeite and austinite by x-ray diffraction methods. <ref>{{cite journal|last1=Witzke|first1=T.|last2=Steins|first2=M.|last3=Doering|first3=T.|last4=Kolitsch|first4=U.|title=Gottlobite, CaMg(VO4, AsO4)(OH), a new mineral from Friedrichroda, Thuringia, Germany|journal=Neues Jahrbuch fur Mineralogie. Monatshefte.|date=2000|volume=Monatshefte 2000|pages=444-454|accessdate=23 November 2017}}</ref></ref> |
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==Occurrence== |
==Occurrence== |
||
Gottlobite is a relatively rare mineral where only a small quantity of the mineral has been found. It was first observed at the site of a long-abandoned mine on the northern slope of Gottlob hill in Friedrichroda, Thuringia, Germany by Jὒrgen Graf. In this mine, Gottlobite is found in hydrothermal veins of barite that are cutting through [[conglomerate (geology)|conglomerate]]. The crystals of gottlobite can be found embedded in these barite veins or as stand-alone crystals on surrounding minerals. The associated minerals in the area are hausmannite, barite, vanadian adelite, and muscovite. {cite journal|last1=Witzke|first1=T.|last2=Steins|first2=M.|last3=Doering|first3=T.|last4=Kolitsch|first4=U.|title=Gottlobite, CaMg(VO4, AsO4)(OH), a new mineral from Friedrichroda, Thuringia, Germany|journal=Neues Jahrbuch fur Mineralogie. Monatshefte.|date=2000|volume=Monatshefte 2000|pages=444-454|accessdate=23 November 2017}}</ref> |
Gottlobite is a relatively rare mineral where only a small quantity of the mineral has been found. It was first observed at the site of a long-abandoned mine on the northern slope of Gottlob hill in Friedrichroda, Thuringia, Germany by Jὒrgen Graf. In this mine, Gottlobite is found in hydrothermal veins of barite that are cutting through [[conglomerate (geology)|conglomerate]]. The crystals of gottlobite can be found embedded in these barite veins or as stand-alone crystals on surrounding minerals. The associated minerals in the area are hausmannite, barite, vanadian adelite, and muscovite. <ref>{{cite journal|last1=Witzke|first1=T.|last2=Steins|first2=M.|last3=Doering|first3=T.|last4=Kolitsch|first4=U.|title=Gottlobite, CaMg(VO4, AsO4)(OH), a new mineral from Friedrichroda, Thuringia, Germany|journal=Neues Jahrbuch fur Mineralogie. Monatshefte.|date=2000|volume=Monatshefte 2000|pages=444-454|accessdate=23 November 2017}}</ref> |
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==Chemical and crystal properties== |
==Chemical and crystal properties== |
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Analytical methods used on gottlobite to determine its chemical qualities include energy-dispersive x-ray spectrometry (EDX) and wavelength-dispersive x-ray spectrometry (WDX). The EDX revealed the presence and quantities of elements present in the mineral, including Ca, V, As, O and small amounts of Sr. Mg is in gottlobite's chemical formula, but was not found in the EDX testing because of the very similar arsenic (As) lines that were overlapping with magnesium (Mg). It was also determined that the arsenic (As) and vanadium (V) atoms are in tetrahedral coordination with oxygen (O), and the magnesium (Mg) atoms are in octahedral coordination. {cite journal|last1=Witzke|first1=T.|last2=Steins|first2=M.|last3=Doering|first3=T.|last4=Kolitsch|first4=U.|title=Gottlobite, CaMg(VO4, AsO4)(OH), a new mineral from Friedrichroda, Thuringia, Germany|journal=Neues Jahrbuch fur Mineralogie. Monatshefte.|date=2000|volume=Monatshefte 2000|pages=444-454|accessdate=23 November 2017}}</ref> |
Analytical methods used on gottlobite to determine its chemical qualities include energy-dispersive x-ray spectrometry (EDX) and wavelength-dispersive x-ray spectrometry (WDX). The EDX revealed the presence and quantities of elements present in the mineral, including Ca, V, As, O and small amounts of Sr. Mg is in gottlobite's chemical formula, but was not found in the EDX testing because of the very similar arsenic (As) lines that were overlapping with magnesium (Mg). It was also determined that the arsenic (As) and vanadium (V) atoms are in tetrahedral coordination with oxygen (O), and the magnesium (Mg) atoms are in octahedral coordination. <ref>{{cite journal|last1=Witzke|first1=T.|last2=Steins|first2=M.|last3=Doering|first3=T.|last4=Kolitsch|first4=U.|title=Gottlobite, CaMg(VO4, AsO4)(OH), a new mineral from Friedrichroda, Thuringia, Germany|journal=Neues Jahrbuch fur Mineralogie. Monatshefte.|date=2000|volume=Monatshefte 2000|pages=444-454|accessdate=23 November 2017}}</ref> |
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Revision as of 01:31, 27 November 2017
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{{Infobox mineral
| name = Gottlobite
| category = Hydroxide mineral
| image =
| imagesize =
| caption =
| formula = CaMg(VO4, AsO4)(OH)
| molweight = 205.20 gm
| strunz = 08.BH.35
| dana = 41.05.01.10
| system = Orthorhombic
| class =
| symmetry = P222
| unit cell = a = 7.501(4) Å; b = 9.010(7) Å; c = 5.941(4) Å; Z = 4, V = 401.5Å3
| color = Orange to orange-brown
| habit = Isometric to tabular crystals
| cleavage = Not observed
| twinning = Not observed
| fracture = Conchoidal to irregular
| mohs = 4.5
| luster = Vitreous to adamantine
| refractive = nα = 1.797 nβ = 1.805-1.815 nγ = 1.828
| opticalprop = Biaxial negative
| birefringence =
| pleochroism = Medium strong with X = orange-brown, Y = pale yellowish brown, and Z = orange-brown
| streak = Light brownish
| gravity = 3.46
| melt =
| fusibility =
| diagnostic =
| solubility =
| diaphaneity = Transparent
| other = Brittle
| references = [1]Cite error: A <ref> tag is missing the closing </ref> (see the help page).</ref>
Overview
Gottlobite (CaMg•V(As,H,O)) is a mineral that is found as isolated crystals of orange or orange-brown color, or in some cases as isometric grains. The maximum size of the crystals are a half millimeter. Gottlobite is part of the adelite structure group of vanadates and arsenates. As such, it is similar to the minerals tangeite and austinite by x-ray diffraction methods. [2]</ref>
Occurrence
Gottlobite is a relatively rare mineral where only a small quantity of the mineral has been found. It was first observed at the site of a long-abandoned mine on the northern slope of Gottlob hill in Friedrichroda, Thuringia, Germany by Jὒrgen Graf. In this mine, Gottlobite is found in hydrothermal veins of barite that are cutting through conglomerate. The crystals of gottlobite can be found embedded in these barite veins or as stand-alone crystals on surrounding minerals. The associated minerals in the area are hausmannite, barite, vanadian adelite, and muscovite. [3]
Chemical and crystal properties
Analytical methods used on gottlobite to determine its chemical qualities include energy-dispersive x-ray spectrometry (EDX) and wavelength-dispersive x-ray spectrometry (WDX). The EDX revealed the presence and quantities of elements present in the mineral, including Ca, V, As, O and small amounts of Sr. Mg is in gottlobite's chemical formula, but was not found in the EDX testing because of the very similar arsenic (As) lines that were overlapping with magnesium (Mg). It was also determined that the arsenic (As) and vanadium (V) atoms are in tetrahedral coordination with oxygen (O), and the magnesium (Mg) atoms are in octahedral coordination. [4]
See also
References
- ^ Gottlobite. Webmineral. Retrieved on 2017-11-24.
- ^ Witzke, T.; Steins, M.; Doering, T.; Kolitsch, U. (2000). "Gottlobite, CaMg(VO4, AsO4)(OH), a new mineral from Friedrichroda, Thuringia, Germany". Neues Jahrbuch fur Mineralogie. Monatshefte. Monatshefte 2000: 444–454.
{{cite journal}}:|access-date=requires|url=(help) - ^ Witzke, T.; Steins, M.; Doering, T.; Kolitsch, U. (2000). "Gottlobite, CaMg(VO4, AsO4)(OH), a new mineral from Friedrichroda, Thuringia, Germany". Neues Jahrbuch fur Mineralogie. Monatshefte. Monatshefte 2000: 444–454.
{{cite journal}}:|access-date=requires|url=(help) - ^ Witzke, T.; Steins, M.; Doering, T.; Kolitsch, U. (2000). "Gottlobite, CaMg(VO4, AsO4)(OH), a new mineral from Friedrichroda, Thuringia, Germany". Neues Jahrbuch fur Mineralogie. Monatshefte. Monatshefte 2000: 444–454.
{{cite journal}}:|access-date=requires|url=(help)